Author:Mahamood, RM; Akinlabi, ET; Shukla, M; Pityana, Sisa LDate:Oct 2012This paper reports the effect of laser power on the optimum utilization of the powder material, the layer height and the width of the laser Metal Deposited Ti6Al4V. The Ti6Al4V powder was deposited on Ti6Al4V substrate using an Nd: YAG laser ...Read more
Author:Phala, MF; Popoola, API; Tlotleng, Monnamme; Pityana, Sisa LDate:2018A binary Ti-Si (1 : 1) alloy coating was fabricated on Ti-6Al-4V alloy using laser cladding technique where Neodymium yttrium aluminium garnet laser was utilised. Micro-atomised powders of Ti and Si were used for deposition of multi-track ...Read more
Author:Pretorius, JG; Desai, DA; Snedden, Glen CDate:Nov 2019Fatigue failure due to stress raiser regions on critical rotating components in gas turbine engines, such as the shaft, is a crucial aspect. Methods to reduce these stresses and improve fatigue life are a source of ongoing research. Laser ...Read more
Author:Arthur, Nana KK; Kubjane, SM; Popoola, API; Masina, Bathusile N; Pityana, Sisa LDate:May 2023Titanium alloys are prone to increased oxidation rates when exposed to higher temperatures during application. As a result, the components suffer mechanical failure due to the formation of the alpha-case layer at 500 °C. To improve its corrosion ...Read more
Author:Molatlhegi, G; Hoosain, Shaik; Popoola, API; Malatji, N; Pityana, Sisa LDate:Oct 2021Ti-6Al-4V is favourable due to its exquisite properties for example, low modulus, light weight, excellent strength, and corrosion resistance. Despite the excellent properties of the material, the fabrication process of titanium components is ...Read more
Author:Masina, Bathusile N; Akande, Amos A; Mwakikunga, Bonex WDate:Dec 2019Highly oriented VO2 (M1) thin films are difficult to produce using non-crystalline substrates. For example, to produce such films on glass has required post-annealing or the use of a ZnO transparent layer. Here, we overcome this challenge and ...Read more
Author:Kubjane, SM; Arthur, Nana KK; Masina, Bathusile N; Popoola, API; Pityana, Sisa LDate:Sep 2019Because of its low density, high corrosion resistance and high strength to weight ratio, titanium and its alloys are widely used in aerospace applications. As a result, the material is exposed to detrimental environment. An enhancement in ...Read more
Author:Molefe, DM; Labuschagne, FJFWJ; Focke, WW; Van der Westhuizen, I; Ofosu, ODate:Sep 2015Emulsion grade PVC was plasticised with 100 phr diisononyl phthalate and filled with 30 phr of different hydrated filler-type flame retardant additives. Static heat stabilities were determined at 200 oC by following the time dependance of ...Read more
Author:Pelembe, LAM; Dewar, J; Taylor, JRNDate:2002The effect of malting conditions on pearl millet malt quality in two varieties, SDMV 89004 and SDMV 91018, was investigated. Grain was steeped and germinated at four temperatures, 20degrees, 25degrees, 30degrees and 35degreesC, over 5 days. ...Read more
Author:Bolokang, AS; Phasha, MJ; Motaung, DE; Bhero, SDate:2012Cold pressing (CP) of the amorphous-like Co powder suppressed most of the XRD peaks, in particular the peak along (100) plane. The DSC curve of unmilled CP Co powder has shown a distinct sharp exothermic peak at 615◦C. Upon annealing at 700◦C, ...Read more
Author:Daswa, Pfarelo; Gxowa, Zizo; Monareng, Mathibe JI; Mutombo, KalendaDate:Oct 2018Ti-6Al-4V alloys are well known for good corrosion resistance, excellent surface oxide biocompatibility and high specific strength. This paper investigates the influence of milling parameters on the formation of Ti-6Al-4V alloy processed using ...Read more
Author:Ndhundhuma, IM; Falzone, N; Dam, JSDate:Aug 2008Photodynamic therapy (PDT) can be defined as the combination of a light sensitive drug known as a photosensitizer and visible light of specific wavelength. PDT is carried out by administration of photosensitizer either systemically, locally, ...Read more
Author:Malgas, GF; Arendse, CJ; Cele, NP; Cummings, FRDate:Feb 2008This paper reports on the growth of carbon nanotubes (CNTs) by thermal Chemical Vapour Deposition (CVD) and investigates the effects of nitrogen carrier gas flow rates and mixture ratios on the morphology of CNTs on a silicon substrate by ...Read more
Author:Kuyper, L; Weinert, IAG; Mcgill, AEJDate:1993The effect of modified atmosphere packaging in combination with the addition of calcium hypochlorite on the atmosphere composition, colour and microbial quality of mushrooms was investigated. A modified atmosphere which slowed down discolouration ...Read more
Author:Naidoo, Sasha; Zbonak, A; Ahmed, FDate:Sep 2006Productivity of forest plantations in South Africa is highly dependant on soil moisture availability. Soil moisture availability is often limited and evaporative demand is high. Eucalyptus grandis, planted extensively in South Africa, is ...Read more
Author:Kumar, Rakesh; Yakabu, MK; Anandjiwala, RDDate:2010Bio-composites (PF) were successfully prepared by reinforcing poly lactic acid (PLA) with woven flax fibers (F) in the presence of mandelic acid, benzilic acid, dicumyl peroxide (DCP) and zein as dditives. To improve the mechanical properties ...Read more
Author:De Kock, A; Freg, E; Gummow, RJDate:Feb 1998The aim of this investigation is to determine optimised spinel cathode compositions that can be used in lithium cells. The cycling stability of 4 V LixMn2O4 electrodes in lithium, flooded electrolyte glass cells has been improved by the ...Read more
Author:Mphahlele, NDate:Oct 2012Significant attention is being paid to dye solar cells (DSCs) as the next generation in solar cell technology for their low cost alternative to the currently implemented solid state solar cells [1]. In these devices, photosensitisers are one ...Read more
Author:Cele, NP; Ray, SSDate:Oct 2015The dispersion of carbon nanotubes is one of the problems in the application of polymer nanocomposites. In this study, the effect of chemical functionalization of the carbon nanotube surface on the dispersion of the tubes within a polymer is ...Read more
Author:Ojijo, Vincent O; Ray, Suprakas S; Sadiku, RDate:Apr 2012Polylactide/poly[(butylene succinate)-co-adipate] (PLA/PBSA)-organoclay composites were prepared via melt compounding in a batch mixer. The weight ratio of PLA to PBSA was kept at 70:30, while the weight fraction of the organoclay was varied ...Read more